Methods, apparatuses, and systems for wireless communications are described. A base station may send a message with configuration parameters to a wireless device, and the configuration parameters may be for at least two different types of carriers used for communications.

Systems, methods, and instrumentalities are disclosed for network slice selection and/or reselection. A WTRU may receive updated assistance information for network slice selection and/or reselection. The WTRU may apply local policies to determine when to use the updated assistance information to access a network slice. The WTRU may determine whether to contact an existing network slice function or a new network slice function to establish a connection to a network slice. Based on the determination, the WTRU may transmit different information to the network. The network slice selection and/or reselection may be initiated by a WTRU or by a network.

Systems, methods, and instrumentalities are disclosed for network slice selection and/or reselection. A WTRU may receive updated assistance information for network slice selection and/or reselection. The WTRU may apply local policies to determine when to use the updated assistance information to access a network slice. The WTRU may determine whether to contact an existing network slice function or a new network slice function to establish a connection to a network slice. Based on the determination, the WTRU may transmit different information to the network. The network slice selection and/or reselection may be initiated by a WTRU or by a network.

The present disclosure relates to an apparatus and method for transmitting RAN (Radio Access Network) slice-related information, and discloses a user equipment including: a transceiver configured to receive individual control information provided individually for each RAN slice from a network node, and to perform a random access procedure using resources individually configured for each RAN slice based on the individual control information; and a processor for controlling reception of the individual control information, and the random access procedure. Such a user equipment provides an effect of being able to separately transmit control information including, for example, system information for each slice for RAN slicing.

The present disclosure relates to an apparatus and method for transmitting RAN (Radio Access Network) slice-related information, and discloses a user equipment including: a transceiver configured to receive individual control information provided individually for each RAN slice from a network node, and to perform a random access procedure using resources individually configured for each RAN slice based on the individual control information; and a processor for controlling reception of the individual control information, and the random access procedure. Such a user equipment provides an effect of being able to separately transmit control information including, for example, system information for each slice for RAN slicing.

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for rapidly camping on frequencies for a second (e.g., non-legacy) radio access technology (RAT) after discontinuing communications using a first (e.g., legacy) RAT. An example method generally includes terminating an active communications session on a first radio access technology (RAT), measuring signal strength of one or more frequencies supporting a second RAT in a configured list of frequencies, identifying a frequency to camp on based on a priority and a measured signal strength of each frequency in the configured list of frequencies, and camping on the identified frequency.

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for rapidly camping on frequencies for a second (e.g., non-legacy) radio access technology (RAT) after discontinuing communications using a first (e.g., legacy) RAT. An example method generally includes terminating an active communications session on a first radio access technology (RAT), measuring signal strength of one or more frequencies supporting a second RAT in a configured list of frequencies, identifying a frequency to camp on based on a priority and a measured signal strength of each frequency in the configured list of frequencies, and camping on the identified frequency.

A base station transmits, to a wireless device, one or more radio resource control (RRC) messages indicating two-step random access resources of a two-step random access type. The base station receives, while the two-step random access type and a four-step random access type are available for receiving a preamble and based on the two-step random access resources comprising contention-free two-step random access resources, a preamble via the contention-free two-step random access resources.

Method, apparatus, and computer program product for a CORESET beam recovery procedure and a QCL association beam recovery procedure where a condition or rule based UE initiated change of active TCI state is used. The CORESET beam recovery procedure involves a downlink reference signal corresponding to a transmission configuration indication state activated for certain CORESET being determined as a beam failure detection resource. The QCL association beam recovery procedure concerns a UE transmitting a UL request signal to require switching an active TCI state of the CORESET to a currently deactivated TCI state of the same CORESET.

Method, apparatus, and computer program product for a CORESET beam recovery procedure and a QCL association beam recovery procedure where a condition or rule based UE initiated change of active TCI state is used. The CORESET beam recovery procedure involves a downlink reference signal corresponding to a transmission configuration indication state activated for certain CORESET being determined as a beam failure detection resource. The QCL association beam recovery procedure concerns a UE transmitting a UL request signal to require switching an active TCI state of the CORESET to a currently deactivated TCI state of the same CORESET.